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Plan your Class 3 dealer
Suppressors go through a Class 3 (SOT) dealer. The federal tax is $0, and ATF stopped enforcing the Form 4 wait on October 9, 2026, but some states still require federal registration. You still pay the dealer's transfer fee.
Sig Sauer
Overview
The Sig Sauer Pistol Suppressor Piston for .40 S&W features a M14.5x1lh thread pattern, designed to fit specifically with compatible suppressors. This piston acts as a crucial interface between your firearm and suppressor, allowing for efficient gas management and reduced recoil during firing. This product is commonly used in builds that prioritize suppressor integration for .40 caliber handguns.
Specifications
Pistol Suppressor Pistons - Suppressor Piston 40 S&W M14.5x1LH
Price and stock
The SIG Sauer Pistol Suppressor Pistons - Suppressor Piston 40 S&W M14.5x1LH was out of stock everywhere we track for all of September 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $62 at Brownells for when it comes back.
Prices checked · refreshed daily across 37 retailers
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